EP 2190574 B1 20190828 - RARE EARTH ALUMINA PARTICULATE MANUFACTURING METHOD AND APPLICATION
Title (en)
RARE EARTH ALUMINA PARTICULATE MANUFACTURING METHOD AND APPLICATION
Title (de)
VERFAHREN ZUR HERSTELLUNG UND ANWENDUNG VON TEILCHENFÖRMIGEM SELTENERDMETALLALUMINIUMOXID
Title (fr)
PROCÉDÉ DE FABRICATION D'UNE MATIÈRE PARTICULAIRE D'ALUMINE DOPÉE AVEC DES TERRES RARES ET APPLICATION DE CELLE-CI
Publication
Application
Priority
US 2007019052 W 20070829
Abstract (en)
[origin: WO2009029070A1] A rare earth alumina particulate composition manufacturing method and application are disclosed. The rare earth alumina of the invention is a particulate of porous structure with a molecular formula (REx,Al1-x)2O3, phase ? or ? + d characterized by a particle size distribution ranging from 1 to 80µm with a D50 of 5 to 15µm, a pore size distribution ranging from 0.4-200nm with an average pore diameter of 8 to 30nm, a pore volume (PV) raging from 0.5 to 1.2cc/g and a fresh specific surface area (SA) ranging from 130 to 250m2/g after calcination at 500-900°C for 5 to 10 hours. The rare earth alumina retains a SA of greater than 60m2/g after calcination at 1200°C for 4 hours and greater than 40 m2/g after calcination at 1200°C for 50 hours. There is no presence of the a phase or other impurity phases in the long-term aged samples. The rare earth alumina of the invention has a high thermal stability and is a fine three-way catalyst support material. The rare earth alumina is made using wet continuous coprecipitation with a static mixer and a tank reactor featuring simple operation, low cost and high feasibility in industrial production.
IPC 8 full level
B01J 23/10 (2006.01); B01J 21/04 (2006.01); B01J 37/03 (2006.01)
CPC (source: EP US)
B01J 21/04 (2013.01 - EP US); B01J 23/10 (2013.01 - EP US); B01J 35/40 (2024.01 - EP US); B01J 35/615 (2024.01 - EP US); B01J 35/635 (2024.01 - EP US); B01J 35/66 (2024.01 - EP US); B01J 37/03 (2013.01 - EP US); B01J 37/031 (2013.01 - EP US); C01F 7/02 (2013.01 - EP US); C01F 7/34 (2013.01 - EP US); C01P 2002/52 (2013.01 - EP US); C01P 2002/72 (2013.01 - EP US); C01P 2004/61 (2013.01 - EP US); C01P 2006/13 (2013.01 - EP US); C01P 2006/14 (2013.01 - EP US); C01P 2006/17 (2013.01 - EP US)
Citation (opposition)
Opponent : Rhodia Operations
- US 5155085 A 19921013 - HAMANO SEIICHI [JP], et al
- US 6506358 B1 20030114 - STAMIRES DENNIS [US], et al
Opponent : Sasol Germany GmbH
- US 4722920 A 19880202 - KIMURA MAREO [JP], et al
- US 6773690 B1 20040810 - NOWECK KLAUS [DE], et al
- CHURCH ET AL.: "Stabilisation of aluminas by rare earth and alkaline earth ions", APPLIED CATALYSIS, vol. 101, 1993, pages 105 - 116, XP055702632
- ANONYMOUS: "Static Mixing, Reaction, Heat Transfer & Fluid Dynamics Technology", STAMIXCO LLC, 2007, pages 1 - 8, XP055702636
- ANONYMOUS: "Principles of Operation of Static Mixers", STAMIXCO STATIC MIXER PRODUCTS & TECHNOLOGY, 2020, pages 3pp, XP055702638, Retrieved from the Internet <URL:http://www.stamixco-usa.com/principles-of-operation>
- BEGUIN ET AL.: "Stabilization of alumina by addition of lanthanum", APPLIED CATALYSIS, vol. 75, 1991, pages 119 - 132, XP055380618
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2009029070 A1 20090305; CN 101827651 A 20100908; CN 101827651 B 20150610; EP 2190574 A1 20100602; EP 2190574 A4 20121010; EP 2190574 B1 20190828; US 2010285956 A1 20101111; US 8629077 B2 20140114
DOCDB simple family (application)
US 2007019052 W 20070829; CN 200780100835 A 20070829; EP 07811609 A 20070829; US 67566410 A 20100722